Electric fireplace



FIG. 1 is a front view of the electric fireplace showing the new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The portions of the fireplace shown in broken lines form no part of the claimed design. 

The ornamental design for an electric fireplace, as shown and described. 